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Page start date:
November 23, 1927
Page type: diagram, notes
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Some difficulty was encountered in getting a 60 cycle tuned circuit to oscillate with a vacuum tube. The below gives the prsent hookup which works to satisfactory at 60 cycles.
The output was put on the grids of the thyratron tube. Then the m-g set was run so that the frequency was 60 cycles. Beats in the rectified D-c volatge gave an indication of the exact frequency of the tuned circuit. By adjusting the inductance and capacity of the osc. circuit it was possible to bring the two system into phase.
This connection was made and tried. The speed did not hold constant but fluctuated a great deal, even when under no load conditions. Evidently the field current does not change fast enough.
Looking from the thyratron side the circuit is a parallel one consisting of resistance and inductance. We wish the current to go through the inductance u.c. field circuit. To accomplish this an inductance will be put in the resistance circuit.
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